1 files changed, 2 insertions, 2 deletions
diff --git a/monitor/monitor.c b/monitor/monitor.c
index 640496e562..636bcc81c5 100644
--- a/monitor/monitor.c
+++ b/monitor/monitor.c
@@ -716,8 +716,8 @@ int monitor_init(MonitorOptions *opts, bool allow_hmp, Error **errp)
             return -1;
         }
         if (opts->pretty) {
-            warn_report("'pretty' is deprecated for HMP monitors, it has no "
-                        "effect and will be removed in future versions");
+            error_setg(errp, "'pretty' is not compatible with HMP monitors");
+            return -1;
         }
         monitor_init_hmp(chr, true, &local_err);
         break;